The fate of a former Kingsport priest convicted in a decades-old molestation of an altar boy could rest on the shoulders of another Tennessee child rapist.

Attorneys for William “Bill” Casey, 79, on Tuesday asked a three-judge panel of the Tennessee Court of Criminal Appeals to toss out convictions the former priest received in the molestation of a then-teenager more than three decades ago. The victim, Warren Tucker, now in his late 40s, did not disclose the molestation to law enforcement until 2010.

Father and son defense team Rick Spivey and Matthew Spivey are relying in large part on a Wilson County child rape case in which the victim kept the rape quiet for 42 years in arguing Casey’s constitutional rights were violated, and the case should be thrown out.